Question

What is node.acording to physics subject waves motion and sound

Answer 1

Answer:

A node is a point along standing wave where the wave has minimum amplitude. For instance in a vibrating guitar, the ends of the strings are nodes.

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Answer 2

Answer:

A node is a point along a standing wave where the wave has minimum amplitude. For instance, in a vibrating guitar string, the ends of the string are nodes. By changing the position of the end node through frets, the guitarist changes the effective length of the vibrating string and thereby the note played.